Life on earth depends on water, and there is no substitute for it. The curr

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     Life on earth depends on water, and there is no substitute for it. The current assumption is that our
basic needs for water-whether for drinking, agriculture, industry or the raising of fish will always have to
be met. Given that premise (前提) , there are two basic routes we can go:more equal access to water or
better engineering solutions.
     Looking at the engineering solution first, a lot of my research concentrates on what happens to
wetlands when you build dams in river basins, particularly in Africa. The ecology of such areas is almost
entirely driven by the seasonal changes of the river-the pulse of the water. And the fact is that if you build
a dam, you generally spoil the downstream ecology. In the past, such problems have been hidden by a
lack of information. But in the near future, governments will have no excuse for their ignorance.
    The engineers" ability to control water flows has created new kinds of unpredictability too. Dams in
Africa have meant fewer fish, less grazing and less flood- plain (洪泛区) agriculture-none of which were
expected. And their average economic life is assumed to be thirty years. Dams don"t exist forever, but
what will replace them is not clear.
     The challenge for the future is to find new means of controlling water. Although GM technology
(转基因) will allow us to breed better dry land crops, there is no market for companies to develop
crops suitable for the micro-climates of the Sahel and elsewhere in Africa. Who is going to pay for
research on locally appropriate crops in the Third World?1. What"s the main idea of this passage?   A. The challenge for the future.
B. The engineering solutions to water resource and their limitation.
C. The basic means of controlling water.
D. The challenge for developing crops.2. Which of the following statements is NOT true for meeting our basic needs for water? A. Water resource should be used more reasonably.
B. More dams should be built in river basins.
C. More wetlands should be protected from destruction.
D. More dry-land crops could be developed in Africa.

3. The author suggests that governments will have no excuse for their careless ignorance in the future
because .

A. the ecological destruction will be known to the public by researchers
B. the ecological destruction will no longer be a problem in the future
C. the future is an information age
D. governments will face greater challenge in the future4. The author mentions all the problems caused by dams EXCEPT . A. fewer fish
B. less grazing land
C. less farming land
D. less floodplain agriculture5. The last sentence probably implies that . A. no one will invest in developing locally appropriate crops in Africa
B. researchers have no interest in developing dry land crops
C. research on locally appropriate crops in the Third World may be profitable
D. There is less water resource in the Third World

答案

1-5: BBCCA

举一反三

     During the 19th century, it was common to hear people in Europe and America say that the
resources of the sea were unlimited. For example, a noted biologist writing in the mid-19th century
commented that none of the great sea fisheries(渔业) are to be exhausted. Today though, there is
evidence that the resources land and the air,  and that the endangered species (种类) include Herring
and Carp as well as the African Elephant, Indian Tiger, and the American Eagle.
     Further, the threats to fish are more alarming in some ways than the threats to animals and birds.
     This is because fish are a much needed food resource and people throughout the world depend on
fish as an important part of their dish,  and the decline (下降) in the fish supply could have extensive
effects on hunger and population.
     Fishermen in the North Atlantic alone annually harvest 20 billion pounds of fish to satisfy food
demands, but it is important to recognize that these practices cannot continue without depleting (耗尽)
fish storage within the next few years. Sea resources are rapidly declining in many parts of the world,
and the problem cannot he ignored (忽视) .
     We can predict that food supplies in the sea can not last forever.1. According to the speaker, what was the attitude(态度) in the 19th century toward resources of
the sea?A. Declined.
B. Depleted.
C. Limited.
D. Unlimited.2. What is the range(地带)  of the decline in fish supply?  A. Europe and Asia.
B. The whole world.
C. Asia and America.
D. America.3. What does the author believe about sea resources？    A. Sea resources can last forever.
B. None of the great sea fisheries are to be exhausted.
C. Fish supply has no effects on people.
D. Sea resources are important to people.4. Which of the following best describes the purpose of the lecture?A. Unlimited Sea Resources
B. Threats to Animals and Birds
C. Sea Resources on the Decline
D. Protection of Fish

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阅读理解。     Sometime early in the next century, human beings will move to Mars. They will live
there for about a year, and then will be replaced with another group of pioneers. Building
the base on Mars will advance our knowledge of the solar system and aid in our
understanding of the earth.
      We already know that Mars resembles the earth in many aspects : general size,
presence of water, lengthof day, range of temperatures. These resemblances have
caused many people to consider a centuries-long project: to transform Mars.
Transforming means alterinB a planet"s surface so that the Earth"s life forms can
survive there. This concept, previously found only in science fiction is now being
seriously considered by scientists.
     Transforming Mars is theoretically simple : add nitrogen (氮气)and oxygen to the
atmosphere; pump water to the surface; and add the earth"s plants and animals in the
order in which they developed on the Earth. But it will take at least 300 years.
     Some people think that such a project is too huge for humans to undertake, but
there are very good reasons to make the attempt. The earth now contains some 6
billion people and no one has any idea of how many humans the earth can support.
Our very existence and numbers are threatening many other species. We also have
had some experience with transforming our own planet : altering thelandscape ,
theatmosphereand the climate. Currently transforming earth has become a wiser activity
as we try to control global warming, air and water pollution, and" preserve some natural
living places.
      While the possibility of such a project is small, it is not impossible. Even if earthbound
societies come and go in the next 300 years, the project can continue through the work
of the Mars settlers without the need for constant backing from the earth.
The future existence of all the people in our world may very well depend upon our ability
to transform Mars.1. What does the underlined word " altering"mean in the second paragraph?_______A. Warming.
B. Changing.
C. Planting.
D. Building.2. According to the passage the main purpose of transforming Mars is to._______A. do some scientific research work
B. find out its similarity to the Earth
C. avoid the dying way of many other species
D. find on Mars living place for the increasing human beings3. The main reason for causing many people to consider transforming Mars is that._______A. there are some resemblances between the Earth and Mars
B. transforming Mars is theoretically simple
C. our existence and numbers are threatening many other species
D. the development of science and technology is very rapid4. What"s the author"s attitude towards the project?______A. Optimistic.
B. Negative.
C. Sceptical(怀疑的 ) .
D. Objective.

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阅读理解。

Most scientists agreed that cloning an entire human being-besides morally
questionable-was filled with technical problems. After all, research into animal cloning
has already shown that there are hundreds of failures, includingmanybadlydeformed
(畸形的)creatures that were usually miscarried.
Now comes word that it might be easier to clone humans than was previously
believed. People have a genetic quirk(怪癖) that might prevent some of the
developmental deformities associated with animal cloning. One gene, called IGF2R,
is normally imprinted in sheep, cows and mice but not in humans. Human clones would
always inherit non-imprinted IGF2R genes, so there would be no chance of a mix-up
and, their growth would be normal. But what of the other 49 0r so imprinted genes
(遗传基因 ) ?No one knows what troublethey might cause. So the fact humans have
one less imprinted gene than mice, sheep or cows means that human
cloningmightbemarginally (轻微地 ,很少地 ) easier , but not necessarily safer.

1. At present, scientists" opinion about cloning human is that_____A. it will bring out many developmental deformities
B. it faces no moral problems now
C. it might be easier but still not safer
D. it is proved by practice that it is easier, only not so safe2. What caused many badly deformed creatures in animal cloning?______A. A gene called IGF2R.
B. A genetic quirk.
C. A non-imprinted IGF2R.
D. Not clearly found.3. How many imprinted genes might bring danger to human cloning?______A. 51.
B. 50.
C. 49.
D. 48.4. The writer didn"t say but we can infer that his attitude towards cloning human is that______A. it should be encouraged
B. it should be properly controlled
C. it should be stopped
D. it should be forbidden by law

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阅读理解.     Climate change could make much of the world too hot for human habitation (居住)
within just three centuries, according to some scientists.
     These scientists found that rising temperatures in some places mean humans would
be unable to adapt or survive. "" It would begin to occur with global - mean warming
of about 7℃, calling the habitability of some regions into question," the researchers
wrote in a paper.
     With 11-12℃ warming, such regions would spread to include the majority of the
human population as currently distributed. Professor Steven said there was no chance
of the earth heating up by 7℃ this century, but there was a serious risk that the
continued burning of gas and coal could create the problem by 2300. ""There"s
something like a 50/50 chance of that over the long term," he said.
     The study, which examined climate change over a longer period than most other
research, looked at the "heat stress" produced by combining the influence of rising
temperatures and increased humidity (湿度).
     Professor Steven said climate change research had been "short-sighted" not to
realize the long-term consequences of the influence of greenhouse gases blamed for
global warming. "It needs to be paid attention to," he said. "There"s not much we can
do about climate change over the next two decades but there"s still a lot we can do
about the longer term changes." "Near 2300, we may be faced with temperature
increases of 12 degrees or even more," Professor Tony Michael said." If this happens,
our current worries about sea level rise, occasional heat waves and bushfires,
biodiversity (生物品种) loss and agricultural difficulties will appear in front of us -- as
much as half the currently inhabited globe may simply become too hot for people to
live there. "1. Which of the following statements is supported by Professor Steven?______A. The earth will heat up by 7℃ this century.
B. Burning of fuel adds to the earth"s heating.
C. We may be faced with temperature increases of 12 degrees.
D. Climate change would not stop until 2100.2. From the underlined part in Paragraph 5 we learn that Professor Steven______A. thinks scientists should do more research on climate change
B. doesn"t think we can do anything to avoid global warming
C. believes we can do much to prevent the longer term changes
D. wishes to examine climate change over a longer period3. The author mainly wants to tell us that _____.A. the human population is not distributed properly
B. large parts of the earth may be too hot for humans to live on by 2300
C. greenhouse gases are to blame for global warming
D. human beings will die out three centuries later

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阅读理解.     TeleNav Shotgun is a next-generation, Internet - connected GPS navigation device
(导向设备) built for the active business traveler.
     The three C"s of value for Internet-connected GPS:
     ●Confidence: Get to meetings on-time and stress-free with real-time traffic alerts.
Find what you need from Internet- connected search.
     ●Convenience :Plan your trips online before you head out of the door. Access the
latest maps automatically.
     ●Current: Get new features as we continuously innovate (创新). Save money on
gas with fuel prices that are updated regularly.
     Many features are specially designed to help the active business traveler.
      ●While driving, TeleNav Shotgun checks for traffic updates along your route every
five minutes. If there"s trouble ahead, TeleNav Shotgun will let you know with a friendly
voice and a visual sign. With one tap, you can choose to change course, taking into
account the latest traffic conditions in the area.
     ● In your world, it"s often one busy day after another. The last thing you need is the
trouble of writing down addresses so you can put them into your navigation system later.
When life is very busy, TeleNav Shotgun helps keep you organized. With our online
pre-planning feature, you can easily forward addresses to your TeleNav Shotgun from
the convenience of your home or office computer.
     ●We have built one of the largest up-to-date databases of business listings available
online and on a personal navigation device. Look up more than 11 million points of
interest.
Some features that we are currently working on:
     ●Address Share -- Share addresses or your location to meet up with friends more
efficiently.
     ●Weather -- Get up -to -date, detailed weather information.
     ●Commute (通勤) Alerts -- Get emailed alerts about traffic conditions on your
daily commute.
     Price of TeleNav Connected Service
     TeleNav Connected Service Plan Price
     Month - to - Month payment $12
     1-Year Plan $129
     2-Year Plan$239
     "If I was to get a stand alone, it would be the Shotgun." -- JG Mason, Gadgetell
     "I"m connected with TeleNav Shotgun and my whole world is easier to navigate."
-- Dory Delvin1. When you select your destination, TeleNav Shotgun will ______.A. judge whether it is convenient for you to take the trip
B. help reserve tickets and rooms in a hotel
C. offer the route with the least traffic delays
D. show the scenery of the place2. Which of the following statements is NOT an advantage of TeleNav Shotgun?A. Making your world easier to navigate.
B. Making your busy days easier to manage.
C. Finding what you need with ease.
D. Helping improve your work performance.3. Which of the following statements agrees with the value of Convenience of TeleNav Shotgun?A. It is connected to the Internet.
B. It saves money for the users.
C. It can access the latest maps automatically.
D. It has real -time traffic alerts.4. If you buy TeleNav Connected Service on a 2 - Year Plan rather than the monthly pay,
you can save ______.A. $12
B. $49
C. $129
D. $239

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